Physics HELP!!
Two horizontal forces F1 and F2, are pulling an object of mass 3.05kg from two opposite sides. F1 pulls to the right and F2 pulls to the left. The magnitude of F1 is 99.2N. The object moves strictly along the horizontal x-axis, which we chose as positive to the right. Find the...October 24, 2012

MEC
two charges repel each other with a force of 0.1N when they are 5cm apart. Find the forces between the same charges when they are 2cm and 8cm apart.October 24, 2012

Physics
The forace exerted by the air The problem does not state units, this assuming the weight is Kg and acceration is m/s2 g = 9.8 a = .9 from Netwon law sum of force= ma helicopter weight + frame weight X g + frame weight X a= force exerted by air Force =(7900+1100) x 9.8 + (1100 ...October 23, 2012

English
I have to write an essay showing the advantages to online shopping than store shopping. Is an essay doubled spaced?October 21, 2012

College Physics
If Wire A has a poterntial difference of 50V across it and carries a current of 2A. Wire B has a potential difference of 100V across it and also carries a current of 2A. Compare the resistances, rate of flow of charge, and rate of flow of energy in the two wires?October 20, 2012

Math Grade 5
Mr. Jacob is 55 years old and Tony is 7 years old. In how many years will Mr. Jacob be 4 times as old as Tony? Please help me solve this.October 19, 2012

Physics HELP!!
Three point charges have equal magnitudes, two being positive and one negative. These charges are fixed to the corners of an equilateral triangle. The magnitude of each of the charges is 3.66 μC, and the lengths of the sides of a triangle are 2.15 cm. Calculate the ...October 17, 2012

Statistics
Assume that the average annual salary for a worker in the United States is 300,000- and that the annual salaries For Americans are normally distributed with a standard deviation equal to $7,000. Find the following: A. What percentage of Americans earn below $22,000? B. What ...October 14, 2012

science
40 centimeters cubed of dry sand is added to a graduated cylinder containing water, the level of the liquid rose 15 centimeters cubed on the scale. What is the volume, in centimeters cubed of air in the sand?October 12, 2012

science
A 10 centimeters cubed sample of salt having a mass of 8 grams is added to 20 centimeters cubed of water having a mass of 15 grams. What is the mass of the mixture?October 12, 2012

chemistry
A sample of one liquid has a mass of 60 grams and a volume of 50 centimeters cubed; a sample of a second liquid has a mass of 30 grams and a volume of 40 centimeters cubed. They are put in a container and mixed. Can you determine what the mass and the volume of the mixture is?October 12, 2012

math
Please solve this word problem, It will take at least 360 points for Kiko"s team to win the math contest. The scores are 94,82, and 87, but one of Kiko's teammates lost 2 of those points for an incomplete answer. How many points must Kiko earn for her team to win the ...October 11, 2012

math
dr.chen told miranda that her new puppy needs a diet that includes at least 1.54 ounces of protein and 0.56 ounce of fat each day to grow into a healthy dog. each cup of good start puppy food contains 0.84 ounce of protein and 0.12 ounce od fat. each cup of sirius puppy food ...September 20, 2012

math
you invested $4000 in two accounts paying 2% and 9% annual interest, respectively if the total interest earned for the year was $150, how much was invested at each rate. $_was invested at 2% and _$ was invested at 9%September 11, 2012

Psychology
How do you think your psyche has evolved to meet the challenges of your society and culture in this time and place? Can some give me some examples so that I can get an idea?September 11, 2012

COMM 215
When we drive in city traffic, you need to watch the traffic around your carefully. The choices are Pronoun shift in Number, Pronoun shift in Person, Ambiguous Reference, No Error. I picked Pronoun Shift in Person. Is this right?July 30, 2012

COMM 215
The capitalized verb agrees with the subject: One of my friends LIKE this brand of coffee. It is True/False. I picked False.July 30, 2012

Statistics
The confidence interval below for the population variance is based on the following sample statistics: n = 25, x-bar = 31.1, and s = 4.2. 9.29 < standard deviation squared < 42.82 What is the degree of confidence?July 22, 2012

Statistics
No wonder I keep getting the wrong answer. Thank you so much for helping me how to get the answer. Now I know how to do the next problem which is similar to this problem.July 20, 2012

Statistics
But, I'm suppose to use the normal distribution approximation to the binomial distribution.July 20, 2012

Statistics
The probability that a radish seed will germinate is 0.6. Estimate the probability that of 130 randomly selected seeds, exactly 90 will germinate. Note: I keep getting the answer wrong.July 20, 2012

Chemistry
How much 0.300 M NaOH is required to completely neutralize 30.0 ml of 0.15 M HClO4 Clue: M1V1=M2V2 I still don't get it to i times .300x30.0 then times .300 x.15 i just don't understand what i am actually suppose to multiplyJuly 18, 2012

Chemistry
I still don't get it to i times .300x30.0 then times .300 x.15 i just don't understand what i am actually suppose to multiplyJuly 18, 2012

english
Do you think that paying attention to your audience, purpose, and content improves the influence of your writing? Why or why not?July 18, 2012

english
Identify a serious error you find challenging to overcome in your own writing. What method will you use to avoid this error? Would you recommend the method to others? Why or why not?July 18, 2012

algebra
Choose the best response to descrive the polynomial. -4x^3-2x^2+2x A) The coefficients are all negative B) The leading coefficient is negative C) It is a binomial D) It is of degree four. I was thinking it is c could someone tell me if I am right! Thanks!July 17, 2012

algebra
Synthesis: Find a polynomial for the shaded area of each figure. 21t+8 is on top of the outer box and 4t is on the left side of the outer box. On the inter box there is 3t-4 and 2t on the left side of the inter box. the area between the outer box and the inter box is shaded. I...July 17, 2012

english
D is the answer, collective noun is a special class, name groups [things] composed of members [usually people]. Examples: army audience,board,cabinet,class,committee, company,corporation etc...July 17, 2012

US History and Constition
The Monroe Doctrine proclaimed that the Americas should be free from future European colonization and free from European interference in sovereign countries' affairs. It further stated the United States' intention to stay neutral in European wars and in wars between ...July 16, 2012

Algebra
Simplify. Remember to use absoulute value notattion when necessary. If a root cannot be simplified state this. {(7b)exponent4}^(1/4) I did something wrong when I did it.July 15, 2012

Math
you've been to jog for 1 hr a day 3 times a wk, if you jog 5.5 miles per hr, how far will you jog each wkMay 27, 2012

Science
Suppose we allowed each person 1000m^3 of living space in a large building, with ceiling height 3 m. To the nearest order of magnitude, how many 1000m high buildings would have to be built to house the entire population of 8.5 x 10^14 people on the energy-limited Earth, if ...May 25, 2012

maths
Water is leaking out of a barrel. In the first hour, it lost half the number of litres it held, plus one litre. In the second hour, it lost half the remainder plus another litre. In the third hour, it lost half the remainder again, plus a further litre; and during the fourth ...May 22, 2012

english
in the sentence She invented the book wagon in the early 1900's. what is the prepositional phrase and word it modifies?May 21, 2012

English
in the sentence Mary Titcomb was a librarian from Maryland. What is the prepositional phrase and the word it modifies?May 21, 2012

AlgebraB
Help! I have to graph my answer to this problem: ADFG has vertices D (2, 4), F (3,1), and G (1, 2). Find the vertices of the image after the rotation of 180° about the origin.May 17, 2012

physics
a small pith ball carries a charge of -1.3 uc. how many excess electrons does this represent?May 17, 2012

Physics
Here's the question again that I am trying to get help with because I can't figure it out and I got one answer, but I really couldn't understand it. Help please! A ferris wheel makes one rotation in 15 minutes. Find your car's location and the angle of rotation...May 16, 2012

physics
A ferris wheel makes one rotation in 15 minutes. Find your car's location and the angle of rotation after: 3 mins., 5 mins., 9 mins., 12 mins. The diameter of the wheel is 328 ft. and the height, with the base, is 369 ft.May 15, 2012

Pre Algebra
Thanks PsyDAG. This was the very first ferris Wheel so that's why it was so big and held a lot of people. I wasn't given any other information.May 15, 2012

Pre Algebra
Tickets on the ferris wheel cost .50 cents. At least how many tickets were sold? There are 36 cars on the ferris wheel that holds 60 people per car. Suppose every ticket holder rode for two turns of the wheel. At least how many turns did the wheel have to make? I think it'...May 15, 2012

Math
A ferris wheel makes one rotation in 15 minutes. Find your car's location and the angle of rotation after: 3 mins., 5 mins., 9 mins., 12 mins. The diameter of the wheel is 328 ft. and the height, with the base, is 369 ft.May 14, 2012

English
ENGLISH HOMEWORK.. Need to write a antecedent for each Pronoun that is Capitilized in sentences.? Need to write a antecedent for each Pronoun that is Capitilized in sentences 1. Some of the Students brought THEIR lunches to the beach. 2. Ken took Meg home on HIS new motorcycle...May 13, 2012

Finance
Answers for a 10 year us treasury bond has a 3.50 % interest rate, while a same maturity corporate bond has a 5.25 % interest rate. Real interest rates and inflation rate expectations would be for the two bonds. if default risk premium of 1.50 percentage points is estimated ...May 2, 2012

math
Double my tens digit to get my ones digit double me and I am less than 50April 26, 2012

business law
Miguel buys a truck in Texas, then moves to Washington. A year later, he is driving his truck in Oklahoma, and causes an accident by trning into another car, whose driver is from Florida. In what states will the other driver be able to sue Miguel? State the reasons for your ...April 26, 2012

algebra
could you please show me how to do this problem? Bob rows 6 miles downstream in 1 hr, joe rows 6 miles upstream in 2 hr. joe rows 1 mile per hour faster. a. what is each of their speed, bob 6/1=6mph joe 6 + 1 = 7mph is this right?? b. what is the current speed?? downstream R...April 15, 2012

algebra
yes you were right about the zero. Thank you so much for showing me how to do it. annApril 13, 2012

algebra
could you please show me how to do this problem? ballfield costs 14,850,00 to build. the cost per city resident to build it will be based on last census. New census shows population increased by 2200 people, which reduced the cost per resident $75. what is the current ...April 13, 2012

Chemistry
When the following solutions are mixed together, FeSO4 (aq) + Csl (aq): What precipitate if any will form, Write the balanced equation, write the complete ionic equation and wriye the net ionic equation?April 13, 2012